Bathtub drain box



FIG. 1 is a top plan view of a bathtub drain box.

FIG. 2 is a side and bottom perspective view of a bathtub drain box.

FIG. 3 is a front and bottom perspective view of a bathtub drain box; and,

FIG. 4 is rear and bottom perspective view of a bathtub drain box. 

CLAIM The ornamental design for bathtub drain box, as shown. 